Observer for DC voltages in a cascaded H-bridge multilevel STATCOM

León-Morales, J. De; Escalante, M.F.; Mata-Jiménez, M.T.

doi:10.1049/iet-epa:20070063

Cited by 25 publications

(4 citation statements)

References 11 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the high quality output voltage provided by this converter, applications like high power drives [12], [13] and STAtic COMpensators (STATCOMs) [14] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Predictive Control Algorithm Technique for Multilevel Asymmetric Cascaded H-Bridge Inverters

Pérez

Cortés

Rodríguez

2008

IEEE Trans. Ind. Electron.

149

View full text Add to dashboard Cite

Predictive control algorithms have been proposed for power electronic converters, featuring a high performance in terms of dynamic behavior. This is true due mainly to the accurate modeling and the finite set of inputs or possible switching combinations. However, when it is used in multilevel converters, the dynamic performance is degraded, because the optimization algorithm needs to evaluate and search over a large number of possible switching combinations. In this paper, a predictive control algorithm, which exhibits high dynamic performance for multilevel converters, is proposed. The algorithm reduces the complexity of calculations and the number of possible combinations, allowing the use of predictive control with a large number of switching states. Experimental results on a 27-level asymmetric multicell converter, which validate the proposed algorithm, are presented.Index Terms-Asymmetric multicell inverters, multilevel converters, predictive control.

show abstract

“…Considering the high quality output voltage provided by this converter, applications like high power drives [12], [13] and STAtic COMpensators (STATCOMs) [14] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Predictive Control Algorithm Technique for Multilevel Asymmetric Cascaded H-Bridge Inverters

Pérez

Cortés

Rodríguez

2008

IEEE Trans. Ind. Electron.

149

View full text Add to dashboard Cite

show abstract

“…Generally, different types of multilevel converters are adopted in medium voltage applications like FACTS devices because of modularity and simplicity of control strategy. The asymmetrical multilevel converters with unequal dc‐voltage sources are presented in [9–15]. Therefore more voltage steps can be generated at output voltage in comparison with traditional multilevel converters with the same number of components [9].…”

Section: Introductionmentioning

confidence: 99%

“…The literatures have been concentrated on the hybrid converters with asymmetrical configuration since they have approved their abilities and strengths in medium and high‐power applications [9, 12]. Different configurations have been discussed according to a variety of H‐bridge cascaded units and dc‐voltage ratio for improving the output voltage quality [12–15]. However, the different voltage rates of switching devices in hybrid configuration cause to lose its modularity compared with symmetrical cascade converters.…”

Section: Introductionmentioning

confidence: 99%

Cascade‐multi‐cell multilevel converter with reduced number of switches

Ajami

Oskuee

Khosroshahi

et al. 2014

IET Power Electronics

View full text Add to dashboard Cite

Recently applications of multilevel converters have been pointed out because of some advantages include high-quality output waveform, reduced harmonic distortion and lower electromagnetic interference. However, some drawbacks such as increased number of components like switches and dc power supplies and complex pulse width modulation control method are associated with these converters. In this study, a new cascade multilevel converter is introduced named 'cascade-multicell' converter. First, the basic constitutive of the proposed multilevel converter has been explained. Then, symmetric and asymmetric configurations are presented. The number of switches and gate driver circuits in the proposed structure are less than the conventional cascade converter. Therefore its output voltage levels will be increased. Also, the number of on-state switches is reduced in presented topology, and so the conductive losses will be reduced. The peak inverse voltage of the proposed converter is equal with the traditional cascade converter. Finally, simulation and experimental results are presented. The presented results show the validity and effectiveness of the proposed multilevel structure.

show abstract

“…In [5]- [9] the DC bus balancing of cascaded H-bridge as a STATCOM is discussed. In [6] an observer is designed to keep the voltage balancing between the cells, whereas the control strategy seems to be hard to implement. By controlling the active and reactive power of each cell separately, the voltage balancing is achieved in [7], where the procedure complexity increases because of calculating the active and reactive power of each cell.…”

Section: Introductionmentioning

confidence: 99%

A Novel DC Bus Voltage Balancing of Cascaded H-Bridge Converters in D-SSSC Application

Saradarzadeh¹,

Farhangi²,

Schanen³

et al. 2012

Journal of Power Electronics

View full text Add to dashboard Cite

G2ELAB, CNRS UMR 5269, BP 46, 38402, Saint Martin d'Hères, France This paper introduces a new scheme to balance the DC bus voltages of a cascaded H-bridge converter which is used as a Distribution Static Synchronous Series Compensator (D-SSSC) in electrical distribution network. The aim of D-SSSC is to control the power flow between two feeders from different substations. As a result of different cell losses and capacitors tolerance the cells DC bus voltage can deviate from their reference values. In the proposed scheme, by individually modifying the reference PWM signal for each cell, an effective balancing procedure is derived. The new balancing procedure needs only the line current sign and is independent of the main control strategy, which controls the total DC bus voltages of cascaded H-bridge. The effect of modulation index variation on the capacitor voltage is analytically derived for the proposed strategy. The proposed method takes advantages of phase shift carrier based modulation and can be applied for a cascaded H-bridge with any number of cells. Also the system is immune to loss of one cell and the presented procedure can keep balancing between the remaining cells. Simulation studies and experimental results validate the effectiveness of the proposed method in the balancing of DC bus voltages.

show abstract

Observer for DC voltages in a cascaded H-bridge multilevel STATCOM

Cited by 25 publications

References 11 publications

Predictive Control Algorithm Technique for Multilevel Asymmetric Cascaded H-Bridge Inverters

Predictive Control Algorithm Technique for Multilevel Asymmetric Cascaded H-Bridge Inverters

Cascade‐multi‐cell multilevel converter with reduced number of switches

A Novel DC Bus Voltage Balancing of Cascaded H-Bridge Converters in D-SSSC Application

Contact Info

Product

Resources

About